Sudan's paramilitary Rapid Support Forces, announced on Thursday that they had agreed to a proposal for a humanitarian truce put forward by mediators.

The announcement follows the paramilitaries' capture of the major city of El-Fasher, dislodging the army from its last stronghold in the vast western Darfur region.

They have since carried out mass killings, looting and sexual violence there and have in recent days appeared to turn their focus to the neighboring Kordofan region, which remains under army control.

"The Rapid Support Forces affirms its agreement to enter into the humanitarian truce proposed by the Quad countries," the RSF said in a statement, referring to the United States, Egypt, the UAE and Saudi Arabia.

The Sudanese government did not immediately comment on the RSF's announcement.

Earlier in the day, army chief Abdel Fattah al-Burhan had said his forces were "striving for the defeat of the enemy."

"Soon, we will avenge those who have been killed and abused... in all the regions attacked by the rebels," he said in a televised address.

The government had indicated earlier this week that it would press on with the war following an internal meeting on a ceasefire proposal.

The details of the mediators' proposal have not yet been made public, though a previous version put forward in September had called for a three-month humanitarian truce, followed by a permanent ceasefire and a nine-month transition to civilian rule that would have excluded both warring sides.

In its statement, the RSF said the ceasefire was needed "to address the catastrophic humanitarian consequences of the war" and to "ensure the urgent delivery of humanitarian assistance."

The same group has carried out widespread atrocities after seizing El-Fasher following an 18-month siege marked by starvation and bombardments.